no Gough never chucks- there's a huge difference between bending your elbow/arm and using your wrist although from the naked eye it looks pretty much the same.
That is another reason its know that leg spinners can never chuck.
gough clearly uses his wrists. So does Flintoff because if you look at his delivery stride, he uses plenty of wrist action to hit the deck, producing movement off the seam and sometimes jag it back into the right-hander.